Backflow testing device



FIG. 1 is a front/top/left perspective view of a first embodiment of a backflow testing device, showing our new design;

FIG. 2 is a rear/bottom/right perspective view thereof;

FIG. 3 is a front elevation view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a rear elevation view thereof;

FIG. 9 is a front/top/left perspective view a second embodiment of a backflow testing device, stippled for the color black;

FIG. 10 is a rear/bottom/right perspective view thereof, stippled for the color black;

FIG. 11 is a front/top/left perspective view a thrid embodiment of a backflow testing device, wherein the stippled areas represent a contrasted color, the contrasted color being non-black but otherwise not representing a specific color or color combination;

FIG. 12 is a rear/bottom/right perspective view thereof, wherein the stippled areas represent a contrasted color, the contrasted color being non-black but otherwise not representing a specific color or color combination;

FIG. 13 is a front/top/left perspective view a fourth embodiment of a backflow testing device, wherein the stippled areas represent a blue-green color; and,

FIG. 14 is a rear/bottom/right perspective view thereof, wherein the stippled areas represent a blue-green color.

The broken line disclosure of the hook is disposed within a circular cavity in FIGS. 2, 10, 12 and 14.

The broken lines shown throughout the drawing views are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a backflow testing device, as shown and described. 